micromazia

mi·cro·ma·zi·a

(mī'krō-mā'zē-ă),
Condition in which the breasts are rudimentary and functionless.
[micro- + G. mazos, breast]

micromazia

(mī-krō-mā′zē-ă) [Gr. mikros, small, + mastos, breast]
Abnormally small size of the breasts.